Question for emulator coder

Hello and thanks for read my post.
The Cell is an PowerPC with others processors for floating point.
Thus being when RPCS3 are emulating is using just PC CPU ?
Emulating the Cell SPUs is being used the PC CPU floating point of each core ?
Is possible use the floating point processing of GPU video card in Cell emulation ?
If the line above is true is possible in next versions more emulation speed for six cores cpus ?
Thanks.